Myrmecium quasimodo, Silva-Junior & Bonaldo, 2019

Silva-Junior, Claudio J. & Bonaldo, Alexandre B., 2019, Four new species of Myrmecium Latreille, 1824 and complementary description of M. machetero Candiani & Bonaldo, 2017 (Araneae: Corinnidae: Castianeirinae), Zootaxa 4706 (2), pp. 391-400 : 397-400

Myrmecium quasimodo sp. nov.

Fig. 5A J

Type material. ♂ holotype, Parque Nacional do Jamanxim , 5°26’50.6’’S, 55°54’38.2’’W, Itaituba, Pará, Brazil, 8.XII.2009, leg. N. Abrahim ( MPEG. ARA 36013). Paratypes : 1♀, Itaituba , 5°34’20.1”S, 57°18’24.3”W, Pará, 30.X.2009, leg. N. Abrahim ( MPGE. ARA 36012) ; 1♂, Parque Nacional da Amazônia , 4°40’29.3”S, 56°26’49.9”W , Itaituba, Pará, 16.XII.2009, leg. B. Rodrigues ( MPEG. ARA 36014); 1♂, Jacareacanga, 5°53’51.3’’S, 57°41’47.8’’W, Pará, 20.X.2009, leg. N. Abrahim ( MPEG. ARA 36011).

Etymology. The specific name is a noun referring to a fictional character of the 1831 novel “The Hunchback of Notre-Dame” by Victor Hugo, in reference to the characteristic dorsal cymbial hump.

Diagnosis. Males of Myrmecium quasimodo sp. nov. resemble those of M. luepa Candiani & Bonaldo, 2017 by the presence of a conspicuous dorsal cymbial hump ( Fig. 5H ), but differ from the latter by the shorter embolus, which is pointed and with fewer keels. Females resemble those of M. tanguro Candiani & Bonaldo, 2017 by the presence of a semicircular plate in the epigynum, copulatory ducts fused to the secondary spermathecae, and large primary spermathecae, but can be distinguished from the latter species by the secondary spermathecae fused medially ( Figs 5I, J ).

Description. Male (holotype): carapace orange, covered with smaller granules in thoracic region and cephalic region; short, thin white hairs present; long thin black hairs between granules ( Figs 5A, B ); sternum with few granules, red-orange; endites and labium yellowish-orange; chelicerae yellowish-orange. Abdomen light brown, with two dark half-stripes in middle of abdomen, short vitreous brown scutum. Abdominal dorsal scutum fused both anteriorly and laterally to epigastric scutum. Coxae I and II yellowish-white; Fe, Pt, Ti I and II yellowish-brown, with retroventral brown stripe; Ta and Mt I and II brown. Legs III and IV yellowish-brown. Chelicerae: promarginal teeth 3; retromarginal teeth 4. Sternum and carapace fused between legs II and III; coxae II separated from coxae III by more than twice coxa II width; sternal posterior plate T-shaped. Total length 7.16, carapace 4.30 long, 1.00 wide. Eye diameters: AME 0.12, ALE 0.65, PME 0.11, PLE 0.10. Leg measurements: I—femur 2.77 / tibia 2.72 / metatarsus 2.29; II—femur 1.75/ tibia 1.62 / metatarsus 1.30; III— femur 1.62 / tibia 1.33 / metatarsus 1.46; IV—femur 2.90 / tibia 2.24 / metatarsus 2.54. Leg spination: I—tibia vp0-0-0-1-0, vr0-0-1-1-0; metatarsus vp1-0-1-0-0, vr1- 0-1-0-0. II—tibia vp1-0-1-0-0, vr1-0-1-0-0; metatarsus vp1-0-0-1-0, vr1-0-1-0-0. III—tibia p0-0-0-0-0, r0-0-0-0-0, vp0-1-0-1-0, vr0-1-0-1- 0; metatarsus p0-0-0-0-0, r0-0-0-0-0, vp1-0-0-0-0, vr1-0-0-0-0. IV—tibia p0-0-0-0-0, r0- 0-0-0-0, vp0-0-0-1-0, vr0-0-0-0-0; metatarsus p1-0-0-0-0, r1-0-0-0-0, vp1-0-0-0-0, vr1-0-0-0-0. Palp. Tibia longer than wide, ventral excavation present, RTA medium-sized in relation to tibia, flattened and pointing apically; first fold of reservoir reaching middle of tegulum, second fold basal, third fold accentuated, retrolateral; distal sector sinuous. Tegular neck before embolus insertion present ( Figs 5G, H ).

Female: Habitus in Figs 5 D–F. Chelicerae: promarginal teeth 3; retromarginal teeth 4. Total length 8.16, carapace 8.46 long, 1.16 wide. Eye diameters: AME 0.12, ALE 0.62, PME 0.10, PLE 0.10. Leg measurements: I—fe- mur 2.70 / tibia 2.68 / metatarsus 2.12; II—femur 1.66/ tibia 1.62 / metatarsus 1.31; III— femur 1.90 / tibia 1.44 / metatarsus 1.38; IV—femur 2.73 / tibia 2.25 / metatarsus 2.42. Leg spination: I—tibia vp0-0-0-1-0, vr0-0-1-1- 0; metatarsus vp1-0-1-0-0, vr1-0-1-0-0. II—tibia vp1-0-1-0-0, vr1-0-1-0-0; metatarsus vp1-0-0-1-0, vr1-0-1-0-0. III—tibia p0-0-0-0-0, r0-0-0-0-0, vp0-1-0-1-0, vr0-1-0-1- 0; metatarsus p0-0-0-0-0, r0-0-0-0-0, vp1-0-0-0-0, vr1-0- 0-0-0. IV—tibia p0-0-0-0-0, r0-0-0-0-0, vp0-0-0-1-0, vr0-0-0-0-0; metatarsus p1-0-0-0-0, r1-0-0-0-0, vp1-0-0-0-0, vr1-0-0-0-0. Epigynum: Copulatory openings positioned laterally, apertures oriented antero-laterally. Secondary spermathecae fused medially, neck short, primary spermathecae globular; glandular knob present ( Figs 5I, J ).

Material examined. Only the types.

Distribution. Known from southwestern State of Pará, Brazil ( Map 2 ).

Figures

MAP 2. Distribution records of Myrmecium quasimodo sp. nov.

FIGURES 5A J. Myrmecium quasimodo sp. nov.: A male, dorsal view; B same, lateral view; C same, ventral view; D female, dorsal view; E same, lateral view; F same, ventral view; G male palp, ventral view; H same, retrolateral view; I epigynum, ventral view; J same, dorsal view (arrow indicating glandular knob position).Abbreviations: CO, copulatory duct; e, embolus; RTA, retrolateral tibial apophysis; ST I, primary spermathecae; ST II, secondary spermathecae. Scale = 1mm.